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Operand data type bit is invalid for max operator.

  • Apr 27, 2026 9:22 AM UTC
  • 4 replies
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After recent ERP Upgrades , we have been experiencing an error on screens i.e Operand data type bit is invalid for max operator.We have customizations which have a boolean/bit data type & dacs, and now after the recent upgrades we are now having to change them to use integers. Is it an acumatica issue or we have to workaround with our customizations ?

 

Best answer by Naveen Boga

​@John Kihiu This is a known compatibility issue that surfaces after Acumatica upgrades. Here's a full breakdown: 
This is a SQL Server error, not an Acumatica application error. It occurs when Acumatica's  customization tries to execute something like: 

SELECT MAX(MyBooleanField) FROM MyTable

-- SQL Server does NOT support MAX() on a BIT column
-- This is a SQL Server limitation, not Acumatica's

 Solution:

DAC Change

// BEFORE 
[PXDBBool]
[PXUIField(DisplayName = "My Flag")]
public virtual bool? MyFlag { get; set; }

 

// AFTER 
[PXDBInt]
[PXUIField(DisplayName = "My Flag")]
public virtual int? MyFlagInt { get; set; }

// Keep bool property for UI convenience
public virtual bool? MyFlag
{
    get { return MyFlagInt == 1; }
    set { MyFlagInt = value == true ? 1 : 0; }
}

Database Column Change (Most Thorough)

-- Change BIT column to INT in the database
ALTER TABLE [MyCustomTable] 
ALTER COLUMN [MyBooleanField] INT NOT NULL DEFAULT 0;

-- Update existing values
UPDATE [MyCustomTable] 
SET [MyBooleanField] = CASE 
    WHEN [MyBooleanField] = 1 THEN 1 
    ELSE 0 
END;

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4 replies

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  • Jr Varsity I
  • Apr 27, 2026 9:41 AM UTC

Hi ​@John Kihiu Create a calculated field:
=IIf([YourBoolField] = True, 1, 0)
then apply max()

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  • Captain II
  • Apr 27, 2026 11:05 AM UTC

This happens where MAX is used on boolean (BIT) fields. SQL Server does not support this, and the newer version seems to enforce it strictly.

 

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Naveen Boga
Captain II
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  • Captain II
  • Answer
  • Apr 27, 2026 12:58 PM UTC

​@John Kihiu This is a known compatibility issue that surfaces after Acumatica upgrades. Here's a full breakdown: 
This is a SQL Server error, not an Acumatica application error. It occurs when Acumatica's  customization tries to execute something like: 

SELECT MAX(MyBooleanField) FROM MyTable

-- SQL Server does NOT support MAX() on a BIT column
-- This is a SQL Server limitation, not Acumatica's

 Solution:

DAC Change

// BEFORE 
[PXDBBool]
[PXUIField(DisplayName = "My Flag")]
public virtual bool? MyFlag { get; set; }

 

// AFTER 
[PXDBInt]
[PXUIField(DisplayName = "My Flag")]
public virtual int? MyFlagInt { get; set; }

// Keep bool property for UI convenience
public virtual bool? MyFlag
{
    get { return MyFlagInt == 1; }
    set { MyFlagInt = value == true ? 1 : 0; }
}

Database Column Change (Most Thorough)

-- Change BIT column to INT in the database
ALTER TABLE [MyCustomTable] 
ALTER COLUMN [MyBooleanField] INT NOT NULL DEFAULT 0;

-- Update existing values
UPDATE [MyCustomTable] 
SET [MyBooleanField] = CASE 
    WHEN [MyBooleanField] = 1 THEN 1 
    ELSE 0 
END;

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Thank you for this solution sir

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